Along the wall Bx, cos nθ = 1, sin nθ = 0,
b > u > 0
(27)
| ch nΩ = ch log ( | Q | ) | n | = √ | b − a′ | √ | a − u | , |
| q | a − a′ | b − u |
(28)
| sh nΩ = sh log ( | Q | ) | n | = √ | a − b | √ | u − a′ | . |
| q | a − a′ | b − u |
(29)
At x where φ = ∞, u = 0, and q = q0,
| ( | Q | ) | n | = √ | b − a′ | √ | a | + √ | a − b | √ | −a′ | . |
| q0 | a − a′ | b | a − a′ | q |
(30)